/*
 * Copyright (c) 2010, Michael Hengler (developer (at) hengler (dot) de),
 * Nikolaus Moll (developer (at) miblounge (dot) net).
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * * Neither the name of the Jombi project nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL JOMBI BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package net.miblounge.jombi.impl.util;

import java.util.List;

import com.trolltech.qt.core.QSize;

public final class SizeUtil {

	private SizeUtil() {}

	/**
	 * Returns the best fitting size depending on the icon height. Returns the size with the passed
	 * height if possible. If there is no matching height, it tries to return the height with the
	 * smallest height bigger than the passed, and if there is no bigger height it returns the
	 * size with the closed height.
	 * 
	 * @param sizes List of sizes
	 * @param bestHeight height of desired size
	 * @return best fitting size
	 */
	public static QSize getBestSize(final List<QSize> sizes, final int bestHeight) {
		if ((sizes == null) || (sizes.size() == 0)) {
			return new QSize(0, 0);
		}

		QSize result = null;
		int diff = -bestHeight;
		for (final QSize size : sizes) {
			if (size.height() == bestHeight) {
				return size;
			}

			if (size.height() - bestHeight > 0) {
				// icon is bigger than necessary
				if ((diff > 0) && (size.height() - bestHeight < diff)) {
					diff = size.height() - bestHeight;
					result = size;
				} else if (diff < 0) {
					diff = size.height() - bestHeight;
					result = size;
				}
			} else {
				// icon is smaller than necessary
				if ((diff < 0) && (size.height() - bestHeight > diff)) {
					diff = size.height() - bestHeight;
					result = size;
				}
			}
		}

		if (result == null) {
			return sizes.get(0);
		}

		return result;
	}
}
